Paint brush cap



FIG. 1 is a perspective view of a paint brush cap showing my new design engaged with a paint brush;

FIG. 2 is a perspective view of the paint brush cap;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in FIG. 1 are included for the purpose of showing features that form no part of the claimed design. 

CLAIM The ornamental design for a paint brush cap, as shown and described. 